00508nam a2200121Ia 4500 180412s9999||||xx |||||||||||||| ||und|| 851988601 Ahmadu Bello University Library - Zaria Horton, D. Monitoring and evaluating agricultural research D. Horton, P. Ballantyne, W. Peterson, B. Uribe, D. Gapasin and K. Sheridan Wallingford C.A.B. International 1993 xvi, 219p.: ills., tablee Gapasin, D.;Sheridan, K.;Ballantyne, P.;Uribe, B.;Peterson, W. 31257 31257